As many as 138 flights to and from the Delhi airport were cancelled by various airlines on Friday, according to a source.
In the wake of rising tensions between India and Pakistan, security measures have also been enhanced at airports.
Around 27 airports in various parts of the country are closed in the wake of Operation Sindoor, under which armed forces carried out strikes on terror targets in Pakistan and Pakistan-occupied Kashmir on Wednesday in retaliation for the Pahalgam terror attack that had killed at least 26 people last month.
As a result of the closure of the airports, many flights have been cancelled.
A total of 66 domestic departures and 63 arrivals, as well as 5 international departures and 4 arrivals, were cancelled between 5 am and 2 pm on Friday, the source said.
"Delhi airport operations remain normal. However, due to evolving airspace conditions and heightened security measures, some flight schedules and security processing timings may be impacted,' DIAL said in a post on X on Friday.
Delhi International Airport Ltd (DIAL) operates the Indira Gandhi International Airport (IGIA), which is the country's largest and busiest airport.
DIAL also advised passengers to be prepared for additional time at security checkpoints and cooperate with airline and security staff for smooth processing.
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